TY  - RPRT
TI  - An assessment of the near-surface accuracy of the international geomagnetic reference field 1980 model of the main geomagnetic field
AU  - N.W. Peddie
AU  - A.K. Zunde
PY  - 1985
DO  - 10.1016/0031-9201(85)90056-1
UR  - https://pubs.usgs.gov/publication/70013280
ID  - 70013280
ER  -